I'd suggest that the first thing on the agenda would be to come up with an actual design. If there are going to be big changes, you might want to think about a kitchen design specialist. Once you have your design, decide on a budget. That will tell you roughly whether you're looking at granite countertops, caeserstone, corian or laminate. Same with cabinetry: everything is a function of price. By all means, have a good look around kitchen places to see what sorts of surfaces are available, and what appeals to you. And don't forget appliances. Ultimately, though, most of us are constrained by budget.

I think that would look great with floorboards in a classic walnut colour, that would definitely look great with the light cabinets. If you want an idea of how it might look with the end finishes, you can type this into google and they should be able to show you a few.

White-matte cabinets (flat panel, not shaker) and white bench (or maybe epoxy sealed marine ply??...siriuskey can tell you about that), mirror splash. Love the ceilings. I personally would go for a modern, stream-line, no handles, integrated appliances look. This space has real potential to be very cool, even with the slate. It doesn't need any more more texture or darkness. This is a nice kitchen, you should be able to sell it on ebay.

I've long been concerned about the formaldehyde in laminates, which also continues to outgas after installation, but until recently questions about it were met with a blank stare. A few years ago I was pleased to see a sign in the kitchen section of Masters making a claim regarding that (I think it was the first time I saw the E0 rating?) but when I asked for information about it no-one knew what it meant and eventually they suggested I talk to their 'supplier' which turned out to be the hardware supplier who knew nothing about the laminates. Very disappointing when retailers of better safer products fail to take the opportunity to educate customers and promote those products. Good on you Anne Marie for wanting to ask intelligent questions. (I could start a whole new thread....)